Lubricant-gland.



' W. J. RICHARDS.

LUBRIGANT GLAND.

APPLICATION FILED SEPT. 28, 1907.

3,001,68?. Patm-,ed Aug.29,1911.

UNITED STATES PATENT OFFICE,

WALTER J'. RICHARDS, OF MILWAUKEE, WISCONSIN, ASSIGNOR T0 NATIONAL BRAKE 8c ELECTRIC COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

LUBRICANT-GLAND.

Specication of Letters Patent. Patented Aug, 29, 1911.

Application led September 28, 1907. Serial No, 394,961.

tor shaft to a compressor casing or wherever similar conditions are to be met with.

In many motor compressors the compres sor is contained within a 'casing and is geared with a motor on the outside of the casing, the motor shaftpassing through an opening of the casing for that purpose, and as there is a slight pressure within the compressor casing the lubricant which is c'arried up to the motor shaft by the said gearing will be ejected in great quantities through the opening for the motor shaft if no provision is made to prevent its doing so. t

The present invention is designed for the particular purpose of prevent-ing the waste of lubricant 1n this manner, butl is applicable to other uses where somewhat Vsimilar conditions are to be met with.

With the above `and other objects in view 'the invention consists inthe lubricant gland herein claimed, i parts and combinations of parts and allequivalents.

Referrin to the 4accompanying drawings in which like characters of reference indicate. the same parts in the different views;- Figure 1 is a sectional elevation of a lubricant gland .constructed in accordance wit-h this invention and applied to a motor compressor; and, Fig. 2 is a ltransverse sectional view thereof on the plane of line 2 2 of Fig. 1.

In these drawings 5 represents the armature shaft of an electric motor which passes through an opening ofa compressor casing 6 and is journaled in a bearing 7 therein. The motor shaft carries a pinion 8 meshing with ya gear wheel 9 for driving the compressor which is not shown. The gear wheel 9 usually runs in oil and carries great quantities ofit up to the pinion 8..

To prevent the lubricant passing out through the opening -of the compressor casing around the motor shaft, said motor shaft has a flanged ring l0 mounted thereon with a tight working fit, its outwardly extending fiange forming a seal for the opening of the casing by fitting against the walls of the casing with Ia packing ring 11 therebetween. The bearing of the ring l0 upon the motor shaft is of suiiicient length to effectively check the outflow' of lubricant, though a slight amount may find itsway through.

To protect the lubricant which may work through the ringlO, a ring 12 is fixed on the motor shaft close to the ring 10, being preferably heldI to the shaft by a set screw 13, and its tapering flange 14 close tothe ring 10 serves as an oil thrower to throw the lubricant' by centrifugal force away from the shaft and into a guard 15 which forms a housing therefor. The guard 15 is entirely free from the motor shaft and is held in place by bolts 16 passing through its surrounding Harige and through the flange of the ring 10 and threading into the compressor casing 6. A return pipe 17 leads from the bottom of the guard 15 to the lower part of the compressor casing, 6 beneath the oil level thereof so that the oil thrown off by the ring 12 is returned to the compressor casing.

By means of this construction the tight working fit of the ring 10 on the motor shaft prevents most of the leakage of lubricant. between them and the packingy between t-he 'liange of said ring and the compressor casing enables a tight fit between these partsy without liability of binding the ring on the motor shaft, such oil as finds its way through the ring l0 being thrown 0H by the ring 12 into the guard 15 from which it is returned by the pipe 17 to the compressor casing. l

What I claim as my invention'is;

' 1. A lubricant gland, to avoid the waste of lubricant under pressure, comprising a casing subject to an internal pressure, a shaft entering the casin a flanged ring having a tight working t on the shaft, a packing ring between the fiange and the walls of the casing to form a pressure tight connection therewith without binding thel ring on the shaft, a second ring fixed on the shaft outside of the flanged ring, a flange on the second ring for throwing lubricant'therefrom which finds its way between the shaft and theprst mentioned ring, a guard s urrounding the second ring to receive the lubricant thrown off therefrom, means for n securing the guard and the rstmentioned flanged ring to the casing, and a pipe connecting the guard with the casing to return the .lubricant to the casing.

2. A lubricant gland to avoid the escape of lubricant under pressure, comprising a casing subject to an internal pressure and having an opening', a shaft entering the casing through the opening entirely free from the Walls of the opening, a ring having a tight Working fit on the shaft and a surrounding' flange to overlap the edges of the casing around the opening, a yieldingA packing ring interposed between the ange of the ring and the Walls of the casing around the opening, means for securing the ring flange to the casing, said packing` ring serving to permit the casing being sealed,

by means of the flanged ring Without the liability of the ring binding onl the shaft, said ring by its tight Working lit on the shaft serving to largely prevent the escape of lubricant between the ring and the shaft, a hbusingv surrounding the shaft and secured to the flanged ring to form a chamber outside of the flanged ring, an oil-throwing ring fixed on the shaft for throwing against the Walls of the chamber such lubricant as may pass the flanged ring, and a pipe leading from the bottom of the chamber to the casing to return the lubricant to the casing.

In testimony whereof, I affix my signature, in presence of two Witnesses. y

WALTER J. RICHARDS.' Witnesses R. S. C. CALDWELL, ANNA F. SCI-IMIDTBAUER. 

